package exam4;

/**
 * @author HB
 * @version 1.0
 * @description
 * @date 2021/6/18
 */
public class SingletonTest {
    public static void main(String[] args) {
            PrintSpooler p1 = PrintSpooler.getInstance();
            p1.Suspension();
            p1.changeLevel();
            p1.delete();
            PrintSpooler p2 = PrintSpooler.getInstance();
    }
}

